Challenge, Easy,  on  Kubernetes

Resolve Service and External DNS Using a Temporary Pod

Scenario

A Service named earth-svc exists in the planet namespace. Use a temporary Pod to perform DNS resolution tasks and save the results to the dev-machine.

Task

  1. Create a temporary Pod named dns-resolve using the busybox:latest image in the planet namespace. From this Pod, run nslookup to resolve the FQDN of earth-svc and save the full output to :
/home/laborant/earth-svc-ip.txt
  1. Verify the saved IP matches the Service's actual ClusterIP
  2. From the same temporary Pod, execute nslookup google.com and save the entire output to :
/home/laborant/google.txt
  1. Confirm the Pod is automatically removed after the tasks are complete
Hint 1
  • The fully qualified domain name (FQDN) of a Service follows the format <service-name>.<namespace>.svc.cluster.local.
  • Use kubectl run with -it, --restart=Never, and --rm to create a temporary Pod and pipe the nslookup output.

See the official docs: DNS for Services and Pods

Test Cases

How to Author Challenges on iximiuz Labs

Instead of providing a subpar online editing experience, iximiuz Labs offers a helper CLI tool called labctl, allowing you to use your favorite text editor (or a full-featured IDE) to write content from the comfort of your local machine.

Install labctl CLI

curl -sf https://labs.iximiuz.com/cli/install.sh | sh

This will download and install the latest version of the labctl CLI. You only need to do this once per workstation.

Authorize labctl

labctl auth login

This will open a browser window asking you to authorize labctl to access your account. You need to do it after a fresh install of labctl and repeat it whenever the auth session expires.

Pull challenge content

labctl content pull challenge resolve-service-and-external-dns-using-a-temporary-pod-4e5755f7

This will create a local copy of the challenge content in a directory named resolve-service-and-external-dns-using-a-temporary-pod-4e5755f7. You only need to do this once per challenge.

Stream your changes

labctl content push -fw challenge resolve-service-and-external-dns-using-a-temporary-pod-4e5755f7

Run this command in a separate terminal to continuously upload your changes to the server while editing the challenge in your favorite text editor or IDE.

You can also use labctl to create, list, and delete your content. Learn more about the available commands: labctl content --help

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